Esophageal Small Cell Neuroendocrine Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** An aggressive high-grade carcinoma with neuroendocrine differentiation that arises from the esophagus and is composed of malignant small cells. The mitotic count is more than 20 per 2 mm2 and/or the Ki-67 index is more than 20%.

**Synonyms:** - Esophageal Oat Cell Carcinoma - Esophageal Small Cell Carcinoma - Esophageal Small Cell Carcinoma - Esophageal Small Cell NEC - Esophagus Oat Cell Carcinoma - Esophagus Small Cell Carcinoma - Oat Cell Carcinoma of Esophagus - Oat Cell Carcinoma of the Esophagus - Small Cell Carcinoma of Esophagus - Small Cell Carcinoma of the Esophagus - Small Cell Carcinoma, Esophagus